I believe this might be his baptism entry, giving his name as Johannes Jeremias Daniel with father Jan Nel and mother Martha Susanna Olivier:
Parish registers (baptisms, memberships, marriages, deaths), Nederduitse Gereformeerde Kerk, Riversdale (Cape Province), Items 7 - 9, baptisms 1839-1852, Film # 008148270, Image 454 of 1013: https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSK6-HQKD-6?i=453&cat=1153273.
Note that he was married and died in Calitzdorp, and the baptism entry indicates ''Swarteberg'' as the place of baptism.